CN108235082A - A kind of vehicle-mounted audio and video projection system and method - Google Patents
A kind of vehicle-mounted audio and video projection system and method Download PDFInfo
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- CN108235082A CN108235082A CN201810034497.7A CN201810034497A CN108235082A CN 108235082 A CN108235082 A CN 108235082A CN 201810034497 A CN201810034497 A CN 201810034497A CN 108235082 A CN108235082 A CN 108235082A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/4104—Peripherals receiving signals from specially adapted client devices
- H04N21/4122—Peripherals receiving signals from specially adapted client devices additional display device, e.g. video projector
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
- G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
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- Theoretical Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A kind of vehicle-mounted audio and video projection system and method, including, connection management unit, projecting unit, session management unit, data playback unit, USB driving units and UI interface display units, the connection management unit, its mobile equipment accessed according to USB interface controls the projecting unit to be transmitted connection；The projecting unit receives the connection management unit instruction, the order and/or data of transmission and parsing audio and video projection；The session management unit is used for the initialization, startup and the life cycle for safeguarding projection session of control channel and data channel；The data playback unit, for playing the audio, video data that projecting unit receives；The usb interface unit connect with mobile equipment, audio, video data is sent to the projecting unit；The UI interface displays unit is used to carry out information interaction with user.The present invention expands the coverage area of audio and video projection application, and reduces the complexity and cost of projection system on the whole.
Description
Technical field
The present invention relates to smart machine field more particularly to a kind of vehicle-mounted audio and video projective techniques and systems.
Background technology
At present, the small digital products such as mobile phone, mp4 are more and more incorporated in the work and life of people, meanwhile,
These small digital products are liked broadcasting with common video since itself has video playback capability so being increasingly becoming people
Put one of equipment, however no matter mobile phone might as well, mp4, this kind of small digital products as video playback apparatus eventually due to
Screen is smaller, and more people is caused to watch simultaneously, and video is very inconvenient, is unfavorable for people's sharing and appreciate to video frequency program.
Occur a variety of vehicle mobile equipment picture projection schemes, such as Apple Carplay currently on the market,
Android Auto, Baidu Carlife etc. can project the video pictures of mobile equipment on the screen of car-mounted terminal.But
It is that these existing programs only have the function of the mobile equipment picture of certain one kind of projection or only have specific in the mobile equipment of projection
Several functions using picture, it is impossible to while compatible all mobile equipment, this greatly reduces the application range of this technology.
Invention content
In order to solve the shortcomings of the prior art, the purpose of the present invention is to provide a kind of vehicle-mounted audio and video projection systems
And method, car-mounted terminal screen is projected to reach compatible most or all of mobile equipment, expanding audio and video projective technique makes
With the purpose of range.
In order to achieve the above object, vehicle-mounted audio and video projection system provided by the invention, including connection management unit is thrown
Unit, session management unit, data playback unit, USB driving units and UI interface display units are penetrated, wherein,
The connection management unit according to the mobile equipment that USB interface accesses, controls the projecting unit to be transmitted company
It connects；
The projecting unit receives the connection management unit instruction, the order and/or number of transmission and parsing audio and video projection
According to；
The session management unit is used for the initialization, startup and the life for safeguarding projection session of control channel and data channel
Order the period；
The data playback unit, for playing the audio, video data that projecting unit receives；
The usb interface unit connect with mobile equipment, audio, video data is sent to the projecting unit；
The UI interface displays unit is used to carry out information interaction with user.
Further, the projecting unit, including Android projection modules, Carplay projection modules and Carlife
Projection module, wherein,
The Android projection modules are regarded using USB Audio, ADB, AOA2.0 accessory, HID protocol transmission sound
Frequently and control information；
The Carplay projection modules use Carplay agreements transmission audio and video and control information；
The Carlife projection modules use bluetooth, IAP2, EAP, ADB agreement transmission audio and video and control information.
Further, the projecting unit, receives the instruction of the connection management unit, and selection is corresponding
The sound that Android projection modules, Carplay projection modules or Carlife projection modules, transmission and the mobile equipment of parsing are sent regards
The order of frequency projection and/or data.
In order to achieve the above object, vehicle-mounted audio and video projective techniques provided by the invention, include the following steps：
1）The mobile device type of USB interface access is detected, selects corresponding projection module；
2）Session management module starts projection session, and initiates projection request to mobile equipment；
3）Receive the audio, video data of mobile equipment transmission；
4）Decode and play the audio, video data of mobile equipment transmission.
Further, the step 1）It specifically includes,
When the operating system of mobile equipment is android system, according to the selection of user, enable Android projection modules or
Carlife projection modules, and establish transmission connection；
When the operating system of mobile equipment is iOS system, according to the selection of user, enable Carplay projection modules or
Carlife projection modules, and establish transmission connection.
Further, Android projection modules are selected, are assisted using USB Audio, ADB, AOA2.0 accessory, HID
View transmission audio, video data and/or control information；
Carplay projection modules are selected, audio, video data and/or control information are transmitted using Carplay agreements；
Carlife projection modules are selected, are believed using bluetooth, the agreement of IAP2, EAP, ADB transmission audio, video data and/or control
Breath.
Further, the step 4）Further comprise,
Mobile device end records screen-picture variation video, and is encoded, and breaks into video messaging packet and is transmitted to projecting unit；
Projecting unit decoding video message package, data playback unit driving display unit playing audio-video.
Further, the video messaging packet, including, packet header and video content information, wherein, packet header, including video
Length, timestamp and service type.
The advantage of the invention is that expanding the coverage area of audio and video projection application, and projection system is reduced on the whole
Complexity and cost.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that being understood by implementing the present invention.
Description of the drawings
Attached drawing is used to provide further understanding of the present invention, and a part for constitution instruction, and with the present invention's
Embodiment for explaining the present invention, is not construed as limiting the invention together.In the accompanying drawings：
Fig. 1 is the Organization Chart according to the vehicle-mounted audio and video projection system of the present invention.
Fig. 2 is the flow chart according to the vehicle-mounted audio and video projective techniques of the present invention.
Fig. 3 is the sequence diagram according to the vehicle-mounted audio and video projective techniques of the present invention.
Fig. 4 is the structure chart according to the video messaging packet of the present invention.
Specific embodiment
The preferred embodiment of the present invention is illustrated below in conjunction with attached drawing, it should be understood that preferred reality described herein
It applies example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
Fig. 1 is the Organization Chart according to the vehicle-mounted audio and video projection system of the present invention.As shown in Figure 1, the vehicle-mounted sound of the present invention
VIDEO PROJECTION SYSTEM, including connection management unit 10, projecting unit 20, session management unit 30, data playback unit 40, USB
Interface unit 50 and UI interface displays unit 60.
Connection management unit 10, is responsible for the mobile equipment that detection is connected into system by USB interface, and control projecting unit 20 is selected
Suitable projection module is selected, establishes transmission connection.
Projecting unit 20 receives the instruction of connection management unit 10, and corresponding projection module is selected to transmit and parse sound
The order and data of video projection.
The projecting unit 20 of the present invention is thrown including Android projection modules 21, Carplay projection modules 22 and Carlife
Module 23 is penetrated, wherein,
Android projection modules 21 use USB Audio, ADB, AOA2.0 accessory, HID protocol transmission audio, video data
With control information；
Carplay projection modules 22 transmit audio, video data and control information by Carplay agreements；
Carlife projection modules 23 transmit audio, video data and control information by bluetooth, the agreement of IAP2, EAP, ADB.
Session management unit 30, the control being responsible between initialization projection module and data broadcast unit 40, display unit 60
Channel processed and data channel, and it is responsible for starting and safeguarding the life cycle of projection session.
Data playback unit 40 receives and plays the audio, video data that projecting unit 20 is sent, and plays out.
Audio, video data for being connect with mobile equipment, is sent to projecting unit 20 by usb interface unit 50.
UI interface displays unit 60 is used to carry out information interaction with user, receives the input of user, and send it to
Connection management unit 10.
Fig. 2 is according to the flow chart of the vehicle-mounted audio and video projective techniques of the present invention, and Fig. 3 is to be regarded according to the vehicle-mounted sound of the present invention
The sequence diagram of frequency projective techniques.With reference to Fig. 2 and Fig. 3, the vehicle-mounted audio and video projection system projection stream of detailed description of the present invention
Journey.
The mobile equipment, refers generally to the equipment such as mobile phone, tablet.
First, in step 201, when mobile equipment uses USB connections, the mobile equipment of the detection of connection management unit 10 is
System, selects corresponding projection module, and establishes transmission connection, the transmission connection be connect mobile phone and equipment data feedback channel and
Down going channel, wherein, the data of the down going channel transmission of mobile phone to equipment include audio, video data and control information；Equipment is in one's hands
The data of the data feedback channel transmission of machine include recording data and control information.
When the operating system of the mobile equipment of user is android system, connection management unit 10 will be according to user's
Selection enables Android projection modules 21 or Carlife projection modules 23, and establishes transmission connection.When the mobile equipment of user
Operating system when being iOS system, connection management unit 10 by the selection according to user, enable Carplay projection modules 22 or
Carlife projection modules 23, and establish transmission connection.
In step 202, session management module starts projection session, carries out device parameter negotiation and is set with matching, and to movement
Preparation plays projection request.If the projection module of selection is Android projection modules, control channel is initialized（HID protocol）, sound
Frequency channel（AOA2.0 USB audio ）, data channel（AOA2.0 accessory）；If the projection module of selection is
Carplay projection modules then initialize Carplay agreements, if the projection module of selection is Carlife projection modules, initially
Change bluetooth, IAP2, EAP, ADB agreement.
In step 203, mobile device end starts record screen, and by after video data encoding, passed by usb interface unit 50
It is defeated by projecting unit 20.Wherein Android projection modules are transmitted using AOA2.0 accessory agreements or ADB agreements,
Carplay projection modules are transmitted using Carplay agreements, and Carlife is using the agreements transmission such as bluetooth, IAP2, EAP, ADB.
Video is broken into video messaging packet by the video data encoding.Fig. 4 is the video messaging packet according to the present invention
Structure chart.As shown in figure 4, during using Android projection modules 21, video messaging packet includes packet header（header）, video data
（data）Two parts, middle wrapping head have recorded video length again（length）, timestamp（timestamp）And service type
（service type）, each accounts for 32（bit）, video length is 0 ~ 31（bit）, timestamp is 32 ~ 63（bit）, clothes
Service type is 64 ~ 95（bit）.96th（bit）And later is then video data memory space.
The entitled MSG_VIDEO_DATA of message, message id 0x10001.
In step 204, projection module is decoded after receiving video, and data playback unit 40 drives display unit 60 to play
Video, while play the audio that USB Audio are received.
One of ordinary skill in the art will appreciate that：The foregoing is only a preferred embodiment of the present invention, and does not have to
In the limitation present invention, although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art
For, still can to foregoing embodiments record technical solution modify or to which part technical characteristic into
Row equivalent replacement.All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (8)
1. a kind of vehicle-mounted audio and video projection system, including connection management unit, projecting unit, session management unit, data playback
Unit, USB driving units and UI interface display units, which is characterized in that
The connection management unit according to the mobile equipment that USB interface accesses, controls the projecting unit to be transmitted company
It connects；
The projecting unit receives the connection management unit instruction, the order and/or number of transmission and parsing audio and video projection
According to；
The session management unit is used for the initialization, startup and the life for safeguarding projection session of control channel and data channel
Order the period；
The data playback unit, for playing the audio, video data that projecting unit receives；
The usb interface unit connect with mobile equipment, audio, video data is sent to the projecting unit；
The UI interface displays unit is used to carry out information interaction with user.
2. vehicle-mounted audio and video projection system according to claim 1, which is characterized in that the projecting unit is further wrapped
Android projection modules, Carplay projection modules and Carlife projection modules are included, wherein,
The Android projection modules are regarded using USB Audio, ADB, AOA2.0 accessory, HID protocol transmission sound
Frequently and control information；
The Carplay projection modules use Carplay agreements transmission audio and video and control information；
The Carlife projection modules use bluetooth, IAP2, EAP, ADB agreement transmission audio and video and control information.
3. vehicle-mounted audio and video projection system according to claim 2, which is characterized in that the projecting unit receives institute
The instruction of connection management unit is stated, selects corresponding Android projection modules, Carplay projection modules or Carlife projective modules
The order for the audio and video projection that block, transmission and the mobile equipment of parsing are sent and/or data.
4. a kind of vehicle-mounted audio and video projective techniques, which is characterized in that this method includes,
1）The mobile device type of USB interface access is detected, selects corresponding projection module；
2）Session management module starts projection session, and initiates projection request to mobile equipment；
3）Receive the audio, video data of mobile equipment transmission；
4）Decode and play the audio, video data of mobile equipment transmission.
5. vehicle-mounted audio and video projective techniques according to claim 4, which is characterized in that the step 1）It specifically includes,
When the operating system of mobile equipment is android system, according to the selection of user, enable Android projection modules or
Carlife projection modules, and establish transmission connection；
When the operating system of mobile equipment is iOS system, according to the selection of user, enable Carplay projection modules or
Carlife projection modules, and establish transmission connection.
6. vehicle-mounted audio and video projective techniques according to claim 5, which is characterized in that
Android projection modules are selected, audio and video are transmitted using USB Audio, ADB, AOA2.0 accessory, HID protocol
Data and/or control information；
Carplay projection modules are selected, audio, video data and/or control information are transmitted using Carplay agreements；
Carlife projection modules are selected, are believed using bluetooth, the agreement of IAP2, EAP, ADB transmission audio, video data and/or control
Breath.
7. vehicle-mounted audio and video projective techniques according to claim 4, which is characterized in that the step 4）Further comprise,
Mobile device end records screen-picture variation video, and is encoded, and breaks into video messaging packet and is transmitted to projecting unit；
Projecting unit decoding video message package, data playback unit driving display unit playing audio-video.
8. vehicle-mounted audio and video projective techniques according to claim 6, which is characterized in that the video messaging packet, including packet
Head and video content information, wherein, packet header, including video length, timestamp and service type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034497.7A CN108235082A (en) | 2018-01-15 | 2018-01-15 | A kind of vehicle-mounted audio and video projection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034497.7A CN108235082A (en) | 2018-01-15 | 2018-01-15 | A kind of vehicle-mounted audio and video projection system and method |
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| CN108235082A true CN108235082A (en) | 2018-06-29 |
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| CN201810034497.7A Pending CN108235082A (en) | 2018-01-15 | 2018-01-15 | A kind of vehicle-mounted audio and video projection system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111225259A (en) * | 2020-01-19 | 2020-06-02 | 重庆众鸿科技有限公司 | Vehicle-mounted interconnected video display accelerating device |
| CN111246473A (en) * | 2019-08-01 | 2020-06-05 | 深圳市点嘀互联网络有限公司 | Method for automatically acquiring WIFI certificate to connect car machine through Bluetooth protocol bearing Carplay |
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Cited By (2)
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Application publication date: 20180629 |
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